package com.wu.d1_math;

public class systemtest {
    public static void main(String[] args) {
        long time1 = System.currentTimeMillis();
        System.out.println(time1);
        System.out.println("Hello World");
       // System.exit(0);
        System.out.println("Hello World");
        long time2 = System.currentTimeMillis();
        System.out.println(time2);
        System.out.println((time2 - time1)/1000.0);
    }
}
